Wireless charger



FIG. 1 is a front view of a wireless charger;

FIG. 2 is a back view of the wireless charger;

FIG. 3 is a top view of the wireless charger;

FIG. 4 is a bottom view of the wireless charger;

FIG. 5 is a left-side view of the wireless charger;

FIG. 6 is a right-side view of the wireless charger; and,

FIG. 7 is a top perspective view of the wireless charger. 

CLAIM The ornamental design for a wireless charger, as shown and described. 